Other major religions such as Hinduism and Sikhism have no dinosaurs attributed to them as of current.
So a clear winner cannot be decided, although one could assume the Hindus will come out on top as they have multiple Gods.
And even the T-Rex would have a hard time Vs. multiple adversaries. I mean, he was defeated by King Kong for fucks sake.

Raptor Jesus: rawr The Bible was written by God himself, I should know I was there when he wrote it.
Christians: Teach us more Raptor Jesus!
Raptor Jesus: It says here on the 3rd Day God created Dutch Tulips.
He put them in Holland so the Windmills would keep them cool...
Allah-saurus: WINDMILLS DO NOT WORK THAT WAY!!!!11

Allah-saurus lets out a terrible warcryRaptor Jesus cowers in fear before the all mighty Allah-saurus.
Christians flee in terror.